S-8077A317 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure.
• Enhanced durability and wear resistance from the black oxide finish, which also reduces light reflection and provides a sleek appearance.
• Precise alignment and secure mounting thanks to the Class 3A thread fit and standard shoulder, ensuring minimal play in high-vibration applications.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength, suitable for heavy-duty mechanical assemblies.
• Easy installation and removal using a 1/4" hex drive and knurled head, providing excellent grip and torque application without slippage.
• Reliable compliance with ASME B18.3 standards, RoHS, and REACH regulations, ensuring safety and environmental responsibility.
• Optimized for demanding applications with coarse UNC threads and right-hand direction, enabling quick assembly and disassembly in machinery and equipment.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment, corrosion, and mechanical stress. Made from 316 stainless steel with a black oxide finish, it offers exceptional resistance to rust and chemicals, making it ideal for use in marine, chemical processing, and food-grade equipment. The Class 3A thread fit and precise shoulder dimensions ensure accurate positioning in assemblies like rotating shafts, bearings, and pulleys, reducing wear and maintenance costs. Its socket head with hex drive allows for secure tightening in confined spaces, while the knurled texture enhances handling. By meeting ASME B18.3 specifications, this fastener delivers consistent performance in high-stress applications, from automation systems to heavy machinery, ensuring long-term reliability and reduced downtime.

Specification Summary & Compliance

This shoulder screw adheres to strict dimensional tolerances, including a Class 3A thread fit for precise engagement and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The UNC coarse thread and right-hand direction provide reliable fastening in various industrial applications, backed by a hardness of Rockwell B79 for consistent performance.